What role does VKORC1 play in weight loss?

VKORC1 encodes vitamin K epoxide reductase, a key enzyme in the vitamin K cycle, and is best known for its role in warfarin sensitivity. Regarding weight loss, there is no direct, robust evidence linking VKORC1 variants to body weight reduction. Some indirect mechanistic hypotheses exist: vitamin K influences osteocalcin, which may affect glucose metabolism and insulin sensitivity, but these effects are modest and not specific to weight loss. Most research on VKORC1 focuses on pharmacogenetics, not obesity or energy expenditure. Therefore, the evidence is best classified as 'unclear' or 'mechanistic'. Consumers should not expect a DNA test for VKORC1 to provide actionable weight-loss insights. Established weight management strategies—caloric deficit, physical activity, and metabolic health—remain far more relevant.